Simone Bordet
added a comment - 20/Jan/12 1:09 PM Despite various attempts, it turned out to be complicated to support a C# client in the CometD project.
However, other people have done it, in particular Oyatel ( http://oyatel.com ), see https://github.com/Oyatel/CometD.NET
and FrozenMountain ( http://www.frozenmountain.com ).